a. Conclusion: Figure ABCD is a rectangle
b. Check the diagram below, please.
1) Since we have a Conditional Statement,
"If a figure is a square, then the figure is a rectangle"
p ----> q
Figure ABCD is a square then figure ABCD is a rectangle
(Since a square has four right angles, and the rectangle has it too.)
2) Let's draw an Euler diagram:
Since not every rectangle is a square, because it has different measurements for width and length. But every square is a rectangle.
Then the set of squares is ⊂ in the set of rectangles.